Medemia nobilis extracts and methods of use

Abstract

The present invention describes methods for improving the appearance of skin, particularly, treating, ameliorating, preventing, delaying, and/or improving one or more signs of aging, by topically applying compositions comprising an extract of Medemia nobilis.

What is claimed is: 
     
       1. A composition for stimulating collagen, pro-collagen or hyaluronic acid production in the skin of a subject, said composition comprising from 0.075% to 1.25% by weight of a protic solvent extract of  Medemia nobilis , a cosmetically acceptable vehicle, and a preservative selected from the group consisting of disodium EDTA, phenoxyethanol, methyl paraben, ethyl paraben, propyl paraben, imidazolidinyl urea, sodium dehydroacetate, para-hydroxybenzoic acid, hydantoin derivatives, propionate salts, quaternary ammonium compounds, benzyl alcohol, an butylated hydroxytoluene (BHT). 
     
     
       2. The composition according to  claim 1 , wherein said cosmetically acceptable vehicle comprises from about 2% to about 98% by weight water. 
     
     
       3. The composition according to  claim 1 , wherein said preservative comprises disodium EDTA. 
     
     
       4. The composition according to  claim 1 , wherein said preservative comprises phenoxyethanol. 
     
     
       5. The composition according to  claim 1 , wherein said preservative comprises methyl paraben. 
     
     
       6. The composition according to  claim 1 , wherein said preservative comprises ethyl paraben. 
     
     
       7. The composition according to  claim 1 , wherein said preservative comprises propyl paraben. 
     
     
       8. The composition according to  claim 1 , wherein said preservative comprises imidazolidinyl urea. 
     
     
       9. The composition according to  claim 1 , wherein said preservative comprises sodium dehydroacetate. 
     
     
       10. The composition according to  claim 1 , wherein said preservative comprises para-hydroxybenzoic acid. 
     
     
       11. The composition according to  claim 1 , wherein said preservative comprises propionate salts. 
     
     
       12. The composition according to  claim 1 , wherein said preservative comprises quaternary ammonium compounds. 
     
     
       13. The composition according to  claim 1 , wherein said preservative comprises benzyl alcohol. 
     
     
       14. The composition according to  claim 1 , wherein said preservative comprises butylated hydroxytoluene (BHT). 
     
     
       15. The composition according to  claim 1 , wherein said preservative comprises hydantoin derivatives. 
     
     
       16. The composition according to  claim 1 , wherein said vehicle is in the form of an emulsion stabilized with an emulsifier. 
     
     
       17. The composition according to  claim 1 , wherein said composition further includes an ingredient selected from retinoids, N-acetyl tyrosinamide, thiodipropionic acid (TDPA), glycolic acid, and salicylic acid. 
     
     
       18. The composition according to  claim 1 , wherein said protic solvent extract is an ethanolic extract.